/*! Socket.IO.js build:0.9.0, development. Copyright(c) 2011 LearnBoost <dev@learnboost.com> MIT Licensed */
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */
(function (exports, global) {
    /**
     * IO namespace.
     *
     * @namespace
     */
    var io = exports;
    /**
     * Socket.IO version
     *
     * @api public
     */
    io.version = '0.9.0';
    /**
     * Protocol implemented.
     *
     * @api public
     */
    io.protocol = 1;
    /**
     * Available transports, these will be populated with the available transports
     *
     * @api public
     */
    io.transports = [];
    /**
     * Keep track of jsonp callbacks.
     *
     * @api private
     */
    io.j = [];
    /**
     * Keep track of our io.Sockets
     *
     * @api private
     */
    io.sockets = {};
    /**
     * Manages connections to hosts.
     *
     * @param {String} uri
     * @Param {Boolean} force creation of new socket (defaults to false)
     * @api public
     */
    io.connect = function (host, details) {
        var uri = io.util.parseUri(host),
            uuri, socket;
        if (global && global.location) {
            uri.protocol = uri.protocol || global.location.protocol.slice(0, -1);
            uri.host = uri.host || (global.document ? global.document.domain : global.location.hostname);
            uri.port = uri.port || global.location.port;
        }
        uuri = io.util.uniqueUri(uri);
        var options = {
            host: uri.host,
            secure: 'https' == uri.protocol,
            port: uri.port || ('https' == uri.protocol ? 443 : 80),
            query: uri.query || ''
        };
        io.util.merge(options, details);
        if (options['force new connection'] || !io.sockets[uuri]) {
            socket = new io.Socket(options);
        }
        if (!options['force new connection'] && socket) {
            io.sockets[uuri] = socket;
        }
        socket = socket || io.sockets[uuri];
        // if path is different from '' or /
        return socket.of(uri.path.length > 1 ? uri.path : '');
    };
})('object' === typeof module ? module.exports : (this.io = {}), this);
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */
(function (exports, global) {
    /**
     * Utilities namespace.
     *
     * @namespace
     */
    var util = exports.util = {};
    /**
     * Parses an URI
     *
     * @author Steven Levithan <stevenlevithan.com> (MIT license)
     * @api public
     */
    var re = /^(?:(?![^:@]+:[^:@\/]*@)([^:\/?#.]+):)?(?:\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;
    var parts = ['source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host', 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'];
    util.parseUri = function (str) {
        var m = re.exec(str || ''),
            uri = {},
            i = 14;
        while (i--) {
            uri[parts[i]] = m[i] || '';
        }
        return uri;
    };
    /**
     * Produces a unique url that identifies a Socket.IO connection.
     *
     * @param {Object} uri
     * @api public
     */
    util.uniqueUri = function (uri) {
        var protocol = uri.protocol,
            host = uri.host,
            port = uri.port;
        if ('document' in global) {
            host = host || document.domain;
            port = port || (protocol == 'https' && document.location.protocol !== 'https:' ? 443 : document.location.port);
        } else {
            host = host || 'localhost';
            if (!port && protocol == 'https') {
                port = 443;
            }
        }
        return (protocol || 'http') + '://' + host + ':' + (port || 80);
    };
    /**
     * Mergest 2 query strings in to once unique query string
     *
     * @param {String} base
     * @param {String} addition
     * @api public
     */
    util.query = function (base, addition) {
        var query = util.chunkQuery(base || ''),
            components = [];
        util.merge(query, util.chunkQuery(addition || ''));
        for (var part in query) {
            if (query.hasOwnProperty(part)) {
                components.push(part + '=' + query[part]);
            }
        }
        return components.length ? '?' + components.join('&') : '';
    };
    /**
     * Transforms a querystring in to an object
     *
     * @param {String} qs
     * @api public
     */
    util.chunkQuery = function (qs) {
        var query = {},
            params = qs.split('&'),
            i = 0,
            l = params.length,
            kv;
        for (; i < l; ++i) {
            kv = params[i].split('=');
            if (kv[0]) {
                query[kv[0]] = kv[1];
            }
        }
        return query;
    };
    /**
     * Executes the given function when the page is loaded.
     *
     *     io.util.load(function () { console.log('page loaded'); });
     *
     * @param {Function} fn
     * @api public
     */
    var pageLoaded = false;
    util.load = function (fn) {
        if ('document' in global && document.readyState === 'complete' || pageLoaded) {
            return fn();
        }
        util.on(global, 'load', fn, false);
    };
    /**
     * Adds an event.
     *
     * @api private
     */
    util.on = function (element, event, fn, capture) {
        if (element.attachEvent) {
            element.attachEvent('on' + event, fn);
        } else if (element.addEventListener) {
            element.addEventListener(event, fn, capture);
        }
    };
    /**
     * Generates the correct `XMLHttpRequest` for regular and cross domain requests.
     *
     * @param {Boolean} [xdomain] Create a request that can be used cross domain.
     * @returns {XMLHttpRequest|false} If we can create a XMLHttpRequest.
     * @api private
     */
    util.request = function (xdomain) {
        if (xdomain && 'undefined' != typeof XDomainRequest) {
            return new XDomainRequest();
        }
        if ('undefined' != typeof XMLHttpRequest && (!xdomain || util.ua.hasCORS)) {
            return new XMLHttpRequest();
        }
        if (!xdomain) {
            try {
                return new ActiveXObject('Microsoft.XMLHTTP');
            } catch (e) {}
        }
        return null;
    };
    /**
     * XHR based transport constructor.
     *
     * @constructor
     * @api public
     */
    /**
     * Change the internal pageLoaded value.
     */
    if ('undefined' != typeof window) {
        util.load(function () {
            pageLoaded = true;
        });
    }
    /**
     * Defers a function to ensure a spinner is not displayed by the browser
     *
     * @param {Function} fn
     * @api public
     */
    util.defer = function (fn) {
        if (!util.ua.webkit || 'undefined' != typeof importScripts) {
            return fn();
        }
        util.load(function () {
            setTimeout(fn, 100);
        });
    };
    /**
     * Merges two objects.
     *
     * @api public
     */
    util.merge = function merge(target, additional, deep, lastseen) {
        var seen = lastseen || [],
            depth = typeof deep == 'undefined' ? 2 : deep,
            prop;
        for (prop in additional) {
            if (additional.hasOwnProperty(prop) && util.indexOf(seen, prop) < 0) {
                if (typeof target[prop] !== 'object' || !depth) {
                    target[prop] = additional[prop];
                    seen.push(additional[prop]);
                } else {
                    util.merge(target[prop], additional[prop], depth - 1, seen);
                }
            }
        }
        return target;
    };
    /**
     * Merges prototypes from objects
     *
     * @api public
     */
    util.mixin = function (ctor, ctor2) {
        util.merge(ctor.prototype, ctor2.prototype);
    };
    /**
     * Shortcut for prototypical and static inheritance.
     *
     * @api private
     */
    util.inherit = function (ctor, ctor2) {
        function f() {};
        f.prototype = ctor2.prototype;
        ctor.prototype = new f;
    };
    /**
     * Checks if the given object is an Array.
     *
     *     io.util.isArray([]); // true
     *     io.util.isArray({}); // false
     *
     * @param Object obj
     * @api public
     */
    util.isArray = Array.isArray ||
        function (obj) {
            return Object.prototype.toString.call(obj) === '[object Array]';
        };
    /**
     * Intersects values of two arrays into a third
     *
     * @api public
     */
    util.intersect = function (arr, arr2) {
        var ret = [],
            longest = arr.length > arr2.length ? arr : arr2,
            shortest = arr.length > arr2.length ? arr2 : arr;
        for (var i = 0, l = shortest.length; i < l; i++) {
            if (~util.indexOf(longest, shortest[i])) ret.push(shortest[i]);
        }
        return ret;
    }
    /**
     * Array indexOf compatibility.
     *
     * @see bit.ly/a5Dxa2
     * @api public
     */
    util.indexOf = function (arr, o, i) {
        for (var j = arr.length, i = i < 0 ? i + j < 0 ? 0 : i + j : i || 0;
             i < j && arr[i] !== o; i++) {}
        return j <= i ? -1 : i;
    };
    /**
     * Converts enumerables to array.
     *
     * @api public
     */
    util.toArray = function (enu) {
        var arr = [];
        for (var i = 0, l = enu.length; i < l; i++)
            arr.push(enu[i]);
        return arr;
    };
    /**
     * UA / engines detection namespace.
     *
     * @namespace
     */
    util.ua = {};
    /**
     * Whether the UA supports CORS for XHR.
     *
     * @api public
     */
    util.ua.hasCORS = 'undefined' != typeof XMLHttpRequest && (function () {
        try {
            var a = new XMLHttpRequest();
        } catch (e) {
            return false;
        }
        return a.withCredentials != undefined;
    })();
    /**
     * Detect webkit.
     *
     * @api public
     */
    util.ua.webkit = 'undefined' != typeof navigator && /webkit/i.test(navigator.userAgent);
})('undefined' != typeof io ? io : module.exports, this);
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */
(function (exports, io) {
    /**
     * Expose constructor.
     */
    exports.EventEmitter = EventEmitter;
    /**
     * Event emitter constructor.
     *
     * @api public.
     */

    function EventEmitter() {};
    /**
     * Adds a listener
     *
     * @api public
     */
    EventEmitter.prototype.on = function (name, fn) {
        if (!this.$events) {
            this.$events = {};
        }
        if (!this.$events[name]) {
            this.$events[name] = fn;
        } else if (io.util.isArray(this.$events[name])) {
            this.$events[name].push(fn);
        } else {
            this.$events[name] = [this.$events[name], fn];
        }
        return this;
    };
    EventEmitter.prototype.addListener = EventEmitter.prototype.on;
    /**
     * Adds a volatile listener.
     *
     * @api public
     */
    EventEmitter.prototype.once = function (name, fn) {
        var self = this;

        function on() {
            self.removeListener(name, on);
            fn.apply(this, arguments);
        };
        on.listener = fn;
        this.on(name, on);
        return this;
    };
    /**
     * Removes a listener.
     *
     * @api public
     */
    EventEmitter.prototype.removeListener = function (name, fn) {
        if (this.$events && this.$events[name]) {
            var list = this.$events[name];
            if (io.util.isArray(list)) {
                var pos = -1;
                for (var i = 0, l = list.length; i < l; i++) {
                    if (list[i] === fn || (list[i].listener && list[i].listener === fn)) {
                        pos = i;
                        break;
                    }
                }
                if (pos < 0) {
                    return this;
                }
                list.splice(pos, 1);
                if (!list.length) {
                    delete this.$events[name];
                }
            } else if (list === fn || (list.listener && list.listener === fn)) {
                delete this.$events[name];
            }
        }
        return this;
    };
    /**
     * Removes all listeners for an event.
     *
     * @api public
     */
    EventEmitter.prototype.removeAllListeners = function (name) {
        // TODO: enable this when node 0.5 is stable
        //if (name === undefined) {
        //this.$events = {};
        //return this;
        //}
        if (this.$events && this.$events[name]) {
            this.$events[name] = null;
        }
        return this;
    };
    /**
     * Gets all listeners for a certain event.
     *
     * @api publci
     */
    EventEmitter.prototype.listeners = function (name) {
        if (!this.$events) {
            this.$events = {};
        }
        if (!this.$events[name]) {
            this.$events[name] = [];
        }
        if (!io.util.isArray(this.$events[name])) {
            this.$events[name] = [this.$events[name]];
        }
        return this.$events[name];
    };
    /**
     * Emits an event.
     *
     * @api public
     */
    EventEmitter.prototype.emit = function (name) {
        if (!this.$events) {
            return false;
        }
        var handler = this.$events[name];
        if (!handler) {
            return false;
        }
        var args = Array.prototype.slice.call(arguments, 1);
        if ('function' == typeof handler) {
            handler.apply(this, args);
        } else if (io.util.isArray(handler)) {
            var listeners = handler.slice();
            for (var i = 0, l = listeners.length; i < l; i++) {
                listeners[i].apply(this, args);
            }
        } else {
            return false;
        }
        return true;
    };
})('undefined' != typeof io ? io : module.exports, 'undefined' != typeof io ? io : module.parent.exports);
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */
/**
 * Based on JSON2 (http://www.JSON.org/js.html).
 */
(function (exports, nativeJSON) {
    "use strict";
    // use native JSON if it's available
    if (nativeJSON && nativeJSON.parse) {
        return exports.JSON = {
            parse: nativeJSON.parse,
            stringify: nativeJSON.stringify
        }
    }
    var JSON = exports.JSON = {};

    function f(n) {
        // Format integers to have at least two digits.
        return n < 10 ? '0' + n : n;
    }

    function date(d, key) {
        return isFinite(d.valueOf()) ? d.getUTCFullYear() + '-' + f(d.getUTCMonth() + 1) + '-' + f(d.getUTCDate()) + 'T' + f(d.getUTCHours()) + ':' + f(d.getUTCMinutes()) + ':' + f(d.getUTCSeconds()) + 'Z' : null;
    };
    var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
        escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
        gap, indent, meta = { // table of character substitutions
        '\b': '\\b',
        '\t': '\\t',
        '\n': '\\n',
        '\f': '\\f',
        '\r': '\\r',
        '"': '\\"',
        '\\': '\\\\'
    },
        rep;

    function quote(string) {
        // If the string contains no control characters, no quote characters, and no
        // backslash characters, then we can safely slap some quotes around it.
        // Otherwise we must also replace the offending characters with safe escape
        // sequences.
        escapable.lastIndex = 0;
        return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
            var c = meta[a];
            return typeof c === 'string' ? c : '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
        }) + '"' : '"' + string + '"';
    }

    function str(key, holder) {
        // Produce a string from holder[key].
        var i, // The loop counter.
            k, // The member key.
            v, // The member value.
            length, mind = gap,
            partial, value = holder[key];
        // If the value has a toJSON method, call it to obtain a replacement value.
        if (value instanceof Date) {
            value = date(key);
        }
        // If we were called with a replacer function, then call the replacer to
        // obtain a replacement value.
        if (typeof rep === 'function') {
            value = rep.call(holder, key, value);
        }
        // What happens next depends on the value's type.
        switch (typeof value) {
            case 'string':
                return quote(value);
            case 'number':
                // JSON numbers must be finite. Encode non-finite numbers as null.
                return isFinite(value) ? String(value) : 'null';
            case 'boolean':
            case 'null':
                // If the value is a boolean or null, convert it to a string. Note:
                // typeof null does not produce 'null'. The case is included here in
                // the remote chance that this gets fixed someday.
                return String(value);
            // If the type is 'object', we might be dealing with an object or an array or
            // null.
            case 'object':
                // Due to a specification blunder in ECMAScript, typeof null is 'object',
                // so watch out for that case.
                if (!value) {
                    return 'null';
                }
                // Make an array to hold the partial results of stringifying this object value.
                gap += indent;
                partial = [];
                // Is the value an array?
                if (Object.prototype.toString.apply(value) === '[object Array]') {
                    // The value is an array. Stringify every element. Use null as a placeholder
                    // for non-JSON values.
                    length = value.length;
                    for (i = 0; i < length; i += 1) {
                        partial[i] = str(i, value) || 'null';
                    }
                    // Join all of the elements together, separated with commas, and wrap them in
                    // brackets.
                    v = partial.length === 0 ? '[]' : gap ? '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']' : '[' + partial.join(',') + ']';
                    gap = mind;
                    return v;
                }
                // If the replacer is an array, use it to select the members to be stringified.
                if (rep && typeof rep === 'object') {
                    length = rep.length;
                    for (i = 0; i < length; i += 1) {
                        if (typeof rep[i] === 'string') {
                            k = rep[i];
                            v = str(k, value);
                            if (v) {
                                partial.push(quote(k) + (gap ? ': ' : ':') + v);
                            }
                        }
                    }
                } else {
                    // Otherwise, iterate through all of the keys in the object.
                    for (k in value) {
                        if (Object.prototype.hasOwnProperty.call(value, k)) {
                            v = str(k, value);
                            if (v) {
                                partial.push(quote(k) + (gap ? ': ' : ':') + v);
                            }
                        }
                    }
                }
                // Join all of the member texts together, separated with commas,
                // and wrap them in braces.
                v = partial.length === 0 ? '{}' : gap ? '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}' : '{' + partial.join(',') + '}';
                gap = mind;
                return v;
        }
    }
    // If the JSON object does not yet have a stringify method, give it one.
    JSON.stringify = function (value, replacer, space) {
        // The stringify method takes a value and an optional replacer, and an optional
        // space parameter, and returns a JSON text. The replacer can be a function
        // that can replace values, or an array of strings that will select the keys.
        // A default replacer method can be provided. Use of the space parameter can
        // produce text that is more easily readable.
        var i;
        gap = '';
        indent = '';
        // If the space parameter is a number, make an indent string containing that
        // many spaces.
        if (typeof space === 'number') {
            for (i = 0; i < space; i += 1) {
                indent += ' ';
            }
            // If the space parameter is a string, it will be used as the indent string.
        } else if (typeof space === 'string') {
            indent = space;
        }
        // If there is a replacer, it must be a function or an array.
        // Otherwise, throw an error.
        rep = replacer;
        if (replacer && typeof replacer !== 'function' && (typeof replacer !== 'object' || typeof replacer.length !== 'number')) {
            throw new Error('JSON.stringify');
        }
        // Make a fake root object containing our value under the key of ''.
        // Return the result of stringifying the value.
        return str('', {
            '': value
        });
    };
    // If the JSON object does not yet have a parse method, give it one.
    JSON.parse = function (text, reviver) {
        // The parse method takes a text and an optional reviver function, and returns
        // a JavaScript value if the text is a valid JSON text.
        var j;

        function walk(holder, key) {
            // The walk method is used to recursively walk the resulting structure so
            // that modifications can be made.
            var k, v, value = holder[key];
            if (value && typeof value === 'object') {
                for (k in value) {
                    if (Object.prototype.hasOwnProperty.call(value, k)) {
                        v = walk(value, k);
                        if (v !== undefined) {
                            value[k] = v;
                        } else {
                            delete value[k];
                        }
                    }
                }
            }
            return reviver.call(holder, key, value);
        }
        // Parsing happens in four stages. In the first stage, we replace certain
        // Unicode characters with escape sequences. JavaScript handles many characters
        // incorrectly, either silently deleting them, or treating them as line endings.
        text = String(text);
        cx.lastIndex = 0;
        if (cx.test(text)) {
            text = text.replace(cx, function (a) {
                return '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
            });
        }
        // In the second stage, we run the text against regular expressions that look
        // for non-JSON patterns. We are especially concerned with '()' and 'new'
        // because they can cause invocation, and '=' because it can cause mutation.
        // But just to be safe, we want to reject all unexpected forms.
        // We split the second stage into 4 regexp operations in order to work around
        // crippling inefficiencies in IE's and Safari's regexp engines. First we
        // replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
        // replace all simple value tokens with ']' characters. Third, we delete all
        // open brackets that follow a colon or comma or that begin the text. Finally,
        // we look to see that the remaining characters are only whitespace or ']' or
        // ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.
        if (/^[\],:{}\s]*$/.test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@').replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']').replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
            // In the third stage we use the eval function to compile the text into a
            // JavaScript structure. The '{' operator is subject to a syntactic ambiguity
            // in JavaScript: it can begin a block or an object literal. We wrap the text
            // in parens to eliminate the ambiguity.
            j = eval('(' + text + ')');
            // In the optional fourth stage, we recursively walk the new structure, passing
            // each name/value pair to a reviver function for possible transformation.
            return typeof reviver === 'function' ? walk({
                '': j
            }, '') : j;
        }
        // If the text is not JSON parseable, then a SyntaxError is thrown.
        throw new SyntaxError('JSON.parse');
    };
})('undefined' != typeof io ? io : module.exports, typeof JSON !== 'undefined' ? JSON : undefined);
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */
(function (exports, io) {
    /**
     * Parser namespace.
     *
     * @namespace
     */
    var parser = exports.parser = {};
    /**
     * Packet types.
     */
    var packets = parser.packets = ['disconnect', 'connect', 'heartbeat', 'message', 'json', 'event', 'ack', 'error', 'noop'];
    /**
     * Errors reasons.
     */
    var reasons = parser.reasons = ['transport not supported', 'client not handshaken', 'unauthorized'];
    /**
     * Errors advice.
     */
    var advice = parser.advice = ['reconnect'];
    /**
     * Shortcuts.
     */
    var JSON = io.JSON,
        indexOf = io.util.indexOf;
    /**
     * Encodes a packet.
     *
     * @api private
     */
    parser.encodePacket = function (packet) {
        var type = indexOf(packets, packet.type),
            id = packet.id || '',
            endpoint = packet.endpoint || '',
            ack = packet.ack,
            data = null;
        switch (packet.type) {
            case 'error':
                var reason = packet.reason ? indexOf(reasons, packet.reason) : '',
                    adv = packet.advice ? indexOf(advice, packet.advice) : '';
                if (reason !== '' || adv !== '') data = reason + (adv !== '' ? ('+' + adv) : '');
                break;
            case 'message':
                if (packet.data !== '') data = packet.data;
                break;
            case 'event':
                var ev = {
                    name: packet.name
                };
                if (packet.args && packet.args.length) {
                    ev.args = packet.args;
                }
                data = JSON.stringify(ev);
                break;
            case 'json':
                data = JSON.stringify(packet.data);
                break;
            case 'connect':
                if (packet.qs) data = packet.qs;
                break;
            case 'ack':
                data = packet.ackId + (packet.args && packet.args.length ? '+' + JSON.stringify(packet.args) : '');
                break;
        }
        // construct packet with required fragments
        var encoded = [
            type, id + (ack == 'data' ? '+' : ''), endpoint];
        // data fragment is optional
        if (data !== null && data !== undefined) encoded.push(data);
        return encoded.join(':');
    };
    /**
     * Encodes multiple messages (payload).
     *
     * @param {Array} messages
     * @api private
     */
    parser.encodePayload = function (packets) {
        var decoded = '';
        if (packets.length == 1) return packets[0];
        for (var i = 0, l = packets.length; i < l; i++) {
            var packet = packets[i];
            decoded += '\ufffd' + packet.length + '\ufffd' + packets[i];
        }
        return decoded;
    };
    /**
     * Decodes a packet
     *
     * @api private
     */
    var regexp = /([^:]+):([0-9]+)?(\+)?:([^:]+)?:?([\s\S]*)?/;
    parser.decodePacket = function (data) {
        var pieces = data.match(regexp);
        if (!pieces) return {};
        var id = pieces[2] || '',
            data = pieces[5] || '',
            packet = {
                type: packets[pieces[1]],
                endpoint: pieces[4] || ''
            };
        // whether we need to acknowledge the packet
        if (id) {
            packet.id = id;
            if (pieces[3]) packet.ack = 'data';
            else packet.ack = true;
        }
        // handle different packet types
        switch (packet.type) {
            case 'error':
                var pieces = data.split('+');
                packet.reason = reasons[pieces[0]] || '';
                packet.advice = advice[pieces[1]] || '';
                break;
            case 'message':
                packet.data = data || '';
                break;
            case 'event':
                try {
                    var opts = JSON.parse(data);
                    packet.name = opts.name;
                    packet.args = opts.args;
                } catch (e) {}
                packet.args = packet.args || [];
                break;
            case 'json':
                try {
                    packet.data = JSON.parse(data);
                } catch (e) {}
                break;
            case 'connect':
                packet.qs = data || '';
                break;
            case 'ack':
                var pieces = data.match(/^([0-9]+)(\+)?(.*)/);
                if (pieces) {
                    packet.ackId = pieces[1];
                    packet.args = [];
                    if (pieces[3]) {
                        try {
                            packet.args = pieces[3] ? JSON.parse(pieces[3]) : [];
                        } catch (e) {}
                    }
                }
                break;
            case 'disconnect':
            case 'heartbeat':
                break;
        };
        return packet;
    };
    /**
     * Decodes data payload. Detects multiple messages
     *
     * @return {Array} messages
     * @api public
     */
    parser.decodePayload = function (data) {
        // IE doesn't like data[i] for unicode chars, charAt works fine
        if (data.charAt(0) == '\ufffd') {
            var ret = [];
            for (var i = 1, length = ''; i < data.length; i++) {
                if (data.charAt(i) == '\ufffd') {
                    ret.push(parser.decodePacket(data.substr(i + 1).substr(0, length)));
                    i += Number(length) + 1;
                    length = '';
                } else {
                    length += data.charAt(i);
                }
            }
            return ret;
        } else {
            return [parser.decodePacket(data)];
        }
    };
})('undefined' != typeof io ? io : module.exports, 'undefined' != typeof io ? io : module.parent.exports);
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */
(function (exports, io) {
    /**
     * Expose constructor.
     */
    exports.Transport = Transport;
    /**
     * This is the transport template for all supported transport methods.
     *
     * @constructor
     * @api public
     */

    function Transport(socket, sessid) {
        this.socket = socket;
        this.sessid = sessid;
    };
    /**
     * Apply EventEmitter mixin.
     */
    io.util.mixin(Transport, io.EventEmitter);
    /**
     * Handles the response from the server. When a new response is received
     * it will automatically update the timeout, decode the message and
     * forwards the response to the onMessage function for further processing.
     *
     * @param {String} data Response from the server.
     * @api private
     */
    Transport.prototype.onData = function (data) {
        this.clearCloseTimeout();
        // If the connection in currently open (or in a reopening state) reset the close
        // timeout since we have just received data. This check is necessary so
        // that we don't reset the timeout on an explicitly disconnected connection.
        if (this.socket.connected || this.socket.connecting || this.socket.reconnecting) {
            this.setCloseTimeout();
        }
        if (data !== '') {
            // todo: we should only do decodePayload for xhr transports
            var msgs = io.parser.decodePayload(data);
            if (msgs && msgs.length) {
                for (var i = 0, l = msgs.length; i < l; i++) {
                    this.onPacket(msgs[i]);
                }
            }
        }
        return this;
    };
    /**
     * Handles packets.
     *
     * @api private
     */
    Transport.prototype.onPacket = function (packet) {
        if (packet.type == 'heartbeat') {
            return this.onHeartbeat();
        }
        if (packet.type == 'connect' && packet.endpoint == '') {
            this.onConnect();
        }
        this.socket.onPacket(packet);
        return this;
    };
    /**
     * Sets close timeout
     *
     * @api private
     */
    Transport.prototype.setCloseTimeout = function () {
        if (!this.closeTimeout) {
            var self = this;
            this.closeTimeout = setTimeout(function () {
                self.onDisconnect();
            }, this.socket.closeTimeout);
        }
    };
    /**
     * Called when transport disconnects.
     *
     * @api private
     */
    Transport.prototype.onDisconnect = function () {
        if (this.close && this.open) this.close();
        this.clearTimeouts();
        this.socket.onDisconnect();
        return this;
    };
    /**
     * Called when transport connects
     *
     * @api private
     */
    Transport.prototype.onConnect = function () {
        this.socket.onConnect();
        return this;
    }
    /**
     * Clears close timeout
     *
     * @api private
     */
    Transport.prototype.clearCloseTimeout = function () {
        if (this.closeTimeout) {
            clearTimeout(this.closeTimeout);
            this.closeTimeout = null;
        }
    };
    /**
     * Clear timeouts
     *
     * @api private
     */
    Transport.prototype.clearTimeouts = function () {
        this.clearCloseTimeout();
        if (this.reopenTimeout) {
            clearTimeout(this.reopenTimeout);
        }
    };
    /**
     * Sends a packet
     *
     * @param {Object} packet object.
     * @api private
     */
    Transport.prototype.packet = function (packet) {
        this.send(io.parser.encodePacket(packet));
    };
    /**
     * Send the received heartbeat message back to server. So the server
     * knows we are still connected.
     *
     * @param {String} heartbeat Heartbeat response from the server.
     * @api private
     */
    Transport.prototype.onHeartbeat = function (heartbeat) {
        this.packet({
            type: 'heartbeat'
        });
    };
    /**
     * Called when the transport opens.
     *
     * @api private
     */
    Transport.prototype.onOpen = function () {
        this.open = true;
        this.clearCloseTimeout();
        this.socket.onOpen();
    };
    /**
     * Notifies the base when the connection with the Socket.IO server
     * has been disconnected.
     *
     * @api private
     */
    Transport.prototype.onClose = function () {
        var self = this;
        /* FIXME: reopen delay causing a infinit loop
         this.reopenTimeout = setTimeout(function () {
         self.open();
         }, this.socket.options['reopen delay']);*/
        this.open = false;
        this.socket.onClose();
        this.onDisconnect();
    };
    /**
     * Generates a connection url based on the Socket.IO URL Protocol.
     * See <https://github.com/learnboost/socket.io-node/> for more details.
     *
     * @returns {String} Connection url
     * @api private
     */
    Transport.prototype.prepareUrl = function () {
        var options = this.socket.options;
        return this.scheme() + '://' + options.host + ':' + options.port + '/' + options.resource + '/' + io.protocol + '/' + this.name + '/' + this.sessid;
    };
    /**
     * Checks if the transport is ready to start a connection.
     *
     * @param {Socket} socket The socket instance that needs a transport
     * @param {Function} fn The callback
     * @api private
     */
    Transport.prototype.ready = function (socket, fn) {
        fn.call(this);
    };
})('undefined' != typeof io ? io : module.exports, 'undefined' != typeof io ? io : module.parent.exports);
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */
(function (exports, io, global) {
    /**
     * Expose constructor.
     */
    exports.Socket = Socket;
    /**
     * Create a new `Socket.IO client` which can establish a persistent
     * connection with a Socket.IO enabled server.
     *
     * @api public
     */

    function Socket(options) {
        this.options = {
            port: 80,
            secure: false,
            document: 'document' in global ? document : false,
            resource: 'socket.io',
            transports: io.transports,
            'connect timeout': 10000,
            'try multiple transports': true,
            'reconnect': true,
            'reconnection delay': 500,
            'reconnection limit': Infinity,
            'reopen delay': 3000,
            'max reconnection attempts': 10,
            'sync disconnect on unload': true,
            'auto connect': true,
            'flash policy port': 10843
        };
        io.util.merge(this.options, options);
        this.connected = false;
        this.open = false;
        this.connecting = false;
        this.reconnecting = false;
        this.namespaces = {};
        this.buffer = [];
        this.doBuffer = false;
        if (this.options['sync disconnect on unload'] && (!this.isXDomain() || io.util.ua.hasCORS)) {
            var self = this;
            io.util.on(global, 'beforeunload', function () {
                self.disconnectSync();
            }, false);
        }
        if (this.options['auto connect']) {
            this.connect();
        }
    };
    /**
     * Apply EventEmitter mixin.
     */
    io.util.mixin(Socket, io.EventEmitter);
    /**
     * Returns a namespace listener/emitter for this socket
     *
     * @api public
     */
    Socket.prototype.of = function (name) {
        if (!this.namespaces[name]) {
            this.namespaces[name] = new io.SocketNamespace(this, name);
            if (name !== '') {
                this.namespaces[name].packet({
                    type: 'connect'
                });
            }
        }
        return this.namespaces[name];
    };
    /**
     * Emits the given event to the Socket and all namespaces
     *
     * @api private
     */
    Socket.prototype.publish = function () {
        this.emit.apply(this, arguments);
        var nsp;
        for (var i in this.namespaces) {
            if (this.namespaces.hasOwnProperty(i)) {
                nsp = this.of(i);
                nsp.$emit.apply(nsp, arguments);
            }
        }
    };
    /**
     * Performs the handshake
     *
     * @api private
     */

    function empty() {};
    Socket.prototype.handshake = function (fn) {
        var self = this,
            options = this.options;

        function complete(data) {
            if (data instanceof Error) {
                self.onError(data.message);
            } else {
                fn.apply(null, data.split(':'));
            }
        };
        var url = ['http' + (options.secure ? 's' : '') + ':/', options.host + ':' + options.port, options.resource, io.protocol, io.util.query(this.options.query, 't=' + +new Date)].join('/');
        if (this.isXDomain() && !io.util.ua.hasCORS) {
            var insertAt = document.getElementsByTagName('script')[0],
                script = document.createElement('script');
            script.src = url + '&jsonp=' + io.j.length;
            insertAt.parentNode.insertBefore(script, insertAt);
            io.j.push(function (data) {
                complete(data);
                script.parentNode.removeChild(script);
            });
        } else {
            var xhr = io.util.request();
            xhr.open('GET', url, true);
            xhr.withCredentials = true;
            xhr.onreadystatechange = function () {
                if (xhr.readyState == 4) {
                    xhr.onreadystatechange = empty;
                    if (xhr.status == 200) {
                        complete(xhr.responseText);
                    } else {
                        !self.reconnecting && self.onError(xhr.responseText);
                    }
                }
            };
            xhr.send(null);
        }
    };
    /**
     * Find an available transport based on the options supplied in the constructor.
     *
     * @api private
     */
    Socket.prototype.getTransport = function (override) {
        var transports = override || this.transports,
            match;
        for (var i = 0, transport; transport = transports[i]; i++) {
            if (io.Transport[transport] && io.Transport[transport].check(this) && (!this.isXDomain() || io.Transport[transport].xdomainCheck())) {
                return new io.Transport[transport](this, this.sessionid);
            }
        }
        return null;
    };
    /**
     * Connects to the server.
     *
     * @param {Function} [fn] Callback.
     * @returns {io.Socket}
     * @api public
     */
    Socket.prototype.connect = function (fn) {
        if (this.connecting) {
            return this;
        }
        var self = this;
        this.handshake(function (sid, heartbeat, close, transports) {
            self.sessionid = sid;
            self.closeTimeout = close * 1000;
            self.heartbeatTimeout = heartbeat * 1000;
            self.transports = io.util.intersect(
                transports.split(','), self.options.transports);

            function connect(transports) {
                if (self.transport) self.transport.clearTimeouts();
                self.transport = self.getTransport(transports);
                if (!self.transport) return self.publish('connect_failed');
                // once the transport is ready
                self.transport.ready(self, function () {
                    self.connecting = true;
                    self.publish('connecting', self.transport.name);
                    self.transport.open();
                    if (self.options['connect timeout']) {
                        self.connectTimeoutTimer = setTimeout(function () {
                            if (!self.connected) {
                                self.connecting = false;
                                if (self.options['try multiple transports']) {
                                    if (!self.remainingTransports) {
                                        self.remainingTransports = self.transports.slice(0);
                                    }
                                    var remaining = self.remainingTransports;
                                    while (remaining.length > 0 && remaining.splice(0, 1)[0] != self.transport.name) {}
                                    if (remaining.length) {
                                        connect(remaining);
                                    } else {
                                        self.publish('connect_failed');
                                    }
                                }
                            }
                        }, self.options['connect timeout']);
                    }
                });
            }
            connect();
            self.once('connect', function () {
                clearTimeout(self.connectTimeoutTimer);
                fn && typeof fn == 'function' && fn();
            });
        });
        return this;
    };
    /**
     * Sends a message.
     *
     * @param {Object} data packet.
     * @returns {io.Socket}
     * @api public
     */
    Socket.prototype.packet = function (data) {
        if (this.connected && !this.doBuffer) {
            this.transport.packet(data);
        } else {
            this.buffer.push(data);
        }
        return this;
    };
    /**
     * Sets buffer state
     *
     * @api private
     */
    Socket.prototype.setBuffer = function (v) {
        this.doBuffer = v;
        if (!v && this.connected && this.buffer.length) {
            this.transport.payload(this.buffer);
            this.buffer = [];
        }
    };
    /**
     * Disconnect the established connect.
     *
     * @returns {io.Socket}
     * @api public
     */
    Socket.prototype.disconnect = function () {
        if (this.connected) {
            if (this.open) {
                this.of('').packet({
                    type: 'disconnect'
                });
            }
            // handle disconnection immediately
            this.onDisconnect('booted');
        }
        return this;
    };
    /**
     * Disconnects the socket with a sync XHR.
     *
     * @api private
     */
    Socket.prototype.disconnectSync = function () {
        // ensure disconnection
        var xhr = io.util.request(),
            uri = this.resource + '/' + io.protocol + '/' + this.sessionid;
        xhr.open('GET', uri, true);
        // handle disconnection immediately
        this.onDisconnect('booted');
    };
    /**
     * Check if we need to use cross domain enabled transports. Cross domain would
     * be a different port or different domain name.
     *
     * @returns {Boolean}
     * @api private
     */
    Socket.prototype.isXDomain = function () {
        var port = global.location.port || ('https:' == global.location.protocol ? 443 : 80);
        return this.options.host !== global.location.hostname || this.options.port != port;
    };
    /**
     * Called upon handshake.
     *
     * @api private
     */
    Socket.prototype.onConnect = function () {
        if (!this.connected) {
            this.connected = true;
            this.connecting = false;
            if (!this.doBuffer) {
                // make sure to flush the buffer
                this.setBuffer(false);
            }
            this.emit('connect');
        }
    };
    /**
     * Called when the transport opens
     *
     * @api private
     */
    Socket.prototype.onOpen = function () {
        this.open = true;
    };
    /**
     * Called when the transport closes.
     *
     * @api private
     */
    Socket.prototype.onClose = function () {
        this.open = false;
    };
    /**
     * Called when the transport first opens a connection
     *
     * @param text
     */
    Socket.prototype.onPacket = function (packet) {
        this.of(packet.endpoint).onPacket(packet);
    };
    /**
     * Handles an error.
     *
     * @api private
     */
    Socket.prototype.onError = function (err) {
        if (err && err.advice) {
            if (this.options.reconnect && err.advice === 'reconnect' && this.connected) {
                this.disconnect();
                this.reconnect();
            }
        }
        this.publish('error', err && err.reason ? err.reason : err);
    };
    /**
     * Called when the transport disconnects.
     *
     * @api private
     */
    Socket.prototype.onDisconnect = function (reason) {
        var wasConnected = this.connected;
        this.connected = false;
        this.connecting = false;
        this.open = false;
        if (wasConnected) {
            this.transport.close();
            this.transport.clearTimeouts();
            this.publish('disconnect', reason);
            if ('booted' != reason && this.options.reconnect && !this.reconnecting) {
                this.reconnect();
            }
        }
    };
    /**
     * Called upon reconnection.
     *
     * @api private
     */
    Socket.prototype.reconnect = function () {
        this.reconnecting = true;
        this.reconnectionAttempts = 0;
        this.reconnectionDelay = this.options['reconnection delay'];
        var self = this,
            maxAttempts = this.options['max reconnection attempts'],
            tryMultiple = this.options['try multiple transports'],
            limit = this.options['reconnection limit'];

        function reset() {
            if (self.connected) {
                for (var i in self.namespaces) {
                    if (self.namespaces.hasOwnProperty(i) && '' !== i) {
                        self.namespaces[i].packet({
                            type: 'connect'
                        });
                    }
                }
                self.publish('reconnect', self.transport.name, self.reconnectionAttempts);
            }
            clearTimeout(self.reconnectionTimer);
            self.removeListener('connect_failed', maybeReconnect);
            self.removeListener('connect', maybeReconnect);
            self.reconnecting = false;
            delete self.reconnectionAttempts;
            delete self.reconnectionDelay;
            delete self.reconnectionTimer;
            delete self.redoTransports;
            self.options['try multiple transports'] = tryMultiple;
        };

        function maybeReconnect() {
            if (!self.reconnecting) {
                return;
            }
            if (self.connected) {
                return reset();
            };
            if (self.connecting && self.reconnecting) {
                return self.reconnectionTimer = setTimeout(maybeReconnect, 1000);
            }
            if (self.reconnectionAttempts++ >= maxAttempts) {
                if (!self.redoTransports) {
                    self.on('connect_failed', maybeReconnect);
                    self.options['try multiple transports'] = true;
                    self.transport = self.getTransport();
                    self.redoTransports = true;
                    self.connect();
                } else {
                    self.publish('reconnect_failed');
                    reset();
                }
            } else {
                if (self.reconnectionDelay < limit) {
                    self.reconnectionDelay *= 2; // exponential back off
                }
                self.connect();
                self.publish('reconnecting', self.reconnectionDelay, self.reconnectionAttempts);
                self.reconnectionTimer = setTimeout(maybeReconnect, self.reconnectionDelay);
            }
        };
        this.options['try multiple transports'] = false;
        this.reconnectionTimer = setTimeout(maybeReconnect, this.reconnectionDelay);
        this.on('connect', maybeReconnect);
    };
})('undefined' != typeof io ? io : module.exports, 'undefined' != typeof io ? io : module.parent.exports, this);
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */
(function (exports, io) {
    /**
     * Expose constructor.
     */
    exports.SocketNamespace = SocketNamespace;
    /**
     * Socket namespace constructor.
     *
     * @constructor
     * @api public
     */

    function SocketNamespace(socket, name) {
        this.socket = socket;
        this.name = name || '';
        this.flags = {};
        this.json = new Flag(this, 'json');
        this.ackPackets = 0;
        this.acks = {};
    };
    /**
     * Apply EventEmitter mixin.
     */
    io.util.mixin(SocketNamespace, io.EventEmitter);
    /**
     * Copies emit since we override it
     *
     * @api private
     */
    SocketNamespace.prototype.$emit = io.EventEmitter.prototype.emit;
    /**
     * Creates a new namespace, by proxying the request to the socket. This
     * allows us to use the synax as we do on the server.
     *
     * @api public
     */
    SocketNamespace.prototype.of = function () {
        return this.socket.of.apply(this.socket, arguments);
    };
    /**
     * Sends a packet.
     *
     * @api private
     */
    SocketNamespace.prototype.packet = function (packet) {
        packet.endpoint = this.name;
        this.socket.packet(packet);
        this.flags = {};
        return this;
    };
    /**
     * Sends a message
     *
     * @api public
     */
    SocketNamespace.prototype.send = function (data, fn) {
        var packet = {
            type: this.flags.json ? 'json' : 'message',
            data: data
        };
        if ('function' == typeof fn) {
            packet.id = ++this.ackPackets;
            packet.ack = true;
            this.acks[packet.id] = fn;
        }
        return this.packet(packet);
    };
    /**
     * Emits an event
     *
     * @api public
     */
    SocketNamespace.prototype.emit = function (name) {
        var args = Array.prototype.slice.call(arguments, 1),
            lastArg = args[args.length - 1],
            packet = {
                type: 'event',
                name: name
            };
        if ('function' == typeof lastArg) {
            packet.id = ++this.ackPackets;
            packet.ack = 'data';
            this.acks[packet.id] = lastArg;
            args = args.slice(0, args.length - 1);
        }
        packet.args = args;
        return this.packet(packet);
    };
    /**
     * Disconnects the namespace
     *
     * @api private
     */
    SocketNamespace.prototype.disconnect = function () {
        if (this.name === '') {
            this.socket.disconnect();
        } else {
            this.packet({
                type: 'disconnect'
            });
            this.$emit('disconnect');
        }
        return this;
    };
    /**
     * Handles a packet
     *
     * @api private
     */
    SocketNamespace.prototype.onPacket = function (packet) {
        var self = this;

        function ack() {
            self.packet({
                type: 'ack',
                args: io.util.toArray(arguments),
                ackId: packet.id
            });
        };
        switch (packet.type) {
            case 'connect':
                this.$emit('connect');
                break;
            case 'disconnect':
                if (this.name === '') {
                    this.socket.onDisconnect(packet.reason || 'booted');
                } else {
                    this.$emit('disconnect', packet.reason);
                }
                break;
            case 'message':
            case 'json':
                var params = ['message', packet.data];
                if (packet.ack == 'data') {
                    params.push(ack);
                } else if (packet.ack) {
                    this.packet({
                        type: 'ack',
                        ackId: packet.id
                    });
                }
                this.$emit.apply(this, params);
                break;
            case 'event':
                var params = [packet.name].concat(packet.args);
                if (packet.ack == 'data') params.push(ack);
                this.$emit.apply(this, params);
                break;
            case 'ack':
                if (this.acks[packet.ackId]) {
                    this.acks[packet.ackId].apply(this, packet.args);
                    delete this.acks[packet.ackId];
                }
                break;
            case 'error':
                if (packet.advice) {
                    this.socket.onError(packet);
                } else {
                    if (packet.reason == 'unauthorized') {
                        this.$emit('connect_failed', packet.reason);
                    } else {
                        this.$emit('error', packet.reason);
                    }
                }
                break;
        }
    };
    /**
     * Flag interface.
     *
     * @api private
     */

    function Flag(nsp, name) {
        this.namespace = nsp;
        this.name = name;
    };
    /**
     * Send a message
     *
     * @api public
     */
    Flag.prototype.send = function () {
        this.namespace.flags[this.name] = true;
        this.namespace.send.apply(this.namespace, arguments);
    };
    /**
     * Emit an event
     *
     * @api public
     */
    Flag.prototype.emit = function () {
        this.namespace.flags[this.name] = true;
        this.namespace.emit.apply(this.namespace, arguments);
    };
})('undefined' != typeof io ? io : module.exports, 'undefined' != typeof io ? io : module.parent.exports);
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */
(function (exports, io, global) {
    /**
     * Expose constructor.
     */
    exports.websocket = WS;
    /**
     * The WebSocket transport uses the HTML5 WebSocket API to establish an
     * persistent connection with the Socket.IO server. This transport will also
     * be inherited by the FlashSocket fallback as it provides a API compatible
     * polyfill for the WebSockets.
     *
     * @constructor
     * @extends {io.Transport}
     * @api public
     */

    function WS(socket) {
        io.Transport.apply(this, arguments);
    };
    /**
     * Inherits from Transport.
     */
    io.util.inherit(WS, io.Transport);
    /**
     * Transport name
     *
     * @api public
     */
    WS.prototype.name = 'websocket';
    /**
     * Initializes a new `WebSocket` connection with the Socket.IO server. We attach
     * all the appropriate listeners to handle the responses from the server.
     *
     * @returns {Transport}
     * @api public
     */
    WS.prototype.open = function () {
        var query = io.util.query(this.socket.options.query),
            self = this,
            Socket
        if (!Socket) {
            Socket = global.MozWebSocket || global.WebSocket;
        }
        this.websocket = new Socket(this.prepareUrl() + query);
        this.websocket.onopen = function () {
            self.onOpen();
            self.socket.setBuffer(false);
        };
        this.websocket.onmessage = function (ev) {
            self.onData(ev.data);
        };
        this.websocket.onclose = function () {
            self.onClose();
            self.socket.setBuffer(true);
        };
        this.websocket.onerror = function (e) {
            self.onError(e);
        };
        return this;
    };
    /**
     * Send a message to the Socket.IO server. The message will automatically be
     * encoded in the correct message format.
     *
     * @returns {Transport}
     * @api public
     */
    WS.prototype.send = function (data) {
        this.websocket.send(data);
        return this;
    };
    /**
     * Payload
     *
     * @api private
     */
    WS.prototype.payload = function (arr) {
        for (var i = 0, l = arr.length; i < l; i++) {
            this.packet(arr[i]);
        }
        return this;
    };
    /**
     * Disconnect the established `WebSocket` connection.
     *
     * @returns {Transport}
     * @api public
     */
    WS.prototype.close = function () {
        this.websocket.close();
        return this;
    };
    /**
     * Handle the errors that `WebSocket` might be giving when we
     * are attempting to connect or send messages.
     *
     * @param {Error} e The error.
     * @api private
     */
    WS.prototype.onError = function (e) {
        this.socket.onError(e);
    };
    /**
     * Returns the appropriate scheme for the URI generation.
     *
     * @api private
     */
    WS.prototype.scheme = function () {
        return this.socket.options.secure ? 'wss' : 'ws';
    };
    /**
     * Checks if the browser has support for native `WebSockets` and that
     * it's not the polyfill created for the FlashSocket transport.
     *
     * @return {Boolean}
     * @api public
     */
    WS.check = function () {
        return ('WebSocket' in global && !('__addTask' in WebSocket)) || 'MozWebSocket' in global;
    };
    /**
     * Check if the `WebSocket` transport support cross domain communications.
     *
     * @returns {Boolean}
     * @api public
     */
    WS.xdomainCheck = function () {
        return true;
    };
    /**
     * Add the transport to your public io.transports array.
     *
     * @api private
     */
    io.transports.push('websocket');
})('undefined' != typeof io ? io.Transport : module.exports, 'undefined' != typeof io ? io : module.parent.exports, this);
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */
(function (exports, io, global) {
    /**
     * Expose constructor.
     *
     * @api public
     */
    exports.XHR = XHR;
    /**
     * XHR constructor
     *
     * @costructor
     * @api public
     */

    function XHR(socket) {
        if (!socket) return;
        io.Transport.apply(this, arguments);
        this.sendBuffer = [];
    };
    /**
     * Inherits from Transport.
     */
    io.util.inherit(XHR, io.Transport);
    /**
     * Establish a connection
     *
     * @returns {Transport}
     * @api public
     */
    XHR.prototype.open = function () {
        this.socket.setBuffer(false);
        this.onOpen();
        this.get();
        // we need to make sure the request succeeds since we have no indication
        // whether the request opened or not until it succeeded.
        this.setCloseTimeout();
        return this;
    };
    /**
     * Check if we need to send data to the Socket.IO server, if we have data in our
     * buffer we encode it and forward it to the `post` method.
     *
     * @api private
     */
    XHR.prototype.payload = function (payload) {
        var msgs = [];
        for (var i = 0, l = payload.length; i < l; i++) {
            msgs.push(io.parser.encodePacket(payload[i]));
        }
        this.send(io.parser.encodePayload(msgs));
    };
    /**
     * Send data to the Socket.IO server.
     *
     * @param data The message
     * @returns {Transport}
     * @api public
     */
    XHR.prototype.send = function (data) {
        this.post(data);
        return this;
    };
    /**
     * Posts a encoded message to the Socket.IO server.
     *
     * @param {String} data A encoded message.
     * @api private
     */

    function empty() {};
    XHR.prototype.post = function (data) {
        var self = this;
        this.socket.setBuffer(true);

        function stateChange() {
            if (this.readyState == 4) {
                this.onreadystatechange = empty;
                self.posting = false;
                if (this.status == 200) {
                    self.socket.setBuffer(false);
                } else {
                    self.onClose();
                }
            }
        }

        function onload() {
            this.onload = empty;
            self.socket.setBuffer(false);
        };
        this.sendXHR = this.request('POST');
        if (global.XDomainRequest && this.sendXHR instanceof XDomainRequest) {
            this.sendXHR.onload = this.sendXHR.onerror = onload;
        } else {
            this.sendXHR.onreadystatechange = stateChange;
        }
        this.sendXHR.send(data);
    };
    /**
     * Disconnects the established `XHR` connection.
     *
     * @returns {Transport}
     * @api public
     */
    XHR.prototype.close = function () {
        this.onClose();
        return this;
    };
    /**
     * Generates a configured XHR request
     *
     * @param {String} url The url that needs to be requested.
     * @param {String} method The method the request should use.
     * @returns {XMLHttpRequest}
     * @api private
     */
    XHR.prototype.request = function (method) {
        var req = io.util.request(this.socket.isXDomain()),
            query = io.util.query(this.socket.options.query, 't=' + +new Date);
        req.open(method || 'GET', this.prepareUrl() + query, true);
        if (method == 'POST') {
            try {
                if (req.setRequestHeader) {
                    req.setRequestHeader('Content-type', 'text/plain;charset=UTF-8');
                } else {
                    // XDomainRequest
                    req.contentType = 'text/plain';
                }
            } catch (e) {}
        }
        return req;
    };
    /**
     * Returns the scheme to use for the transport URLs.
     *
     * @api private
     */
    XHR.prototype.scheme = function () {
        return this.socket.options.secure ? 'https' : 'http';
    };
    /**
     * Check if the XHR transports are supported
     *
     * @param {Boolean} xdomain Check if we support cross domain requests.
     * @returns {Boolean}
     * @api public
     */
    XHR.check = function (socket, xdomain) {
        try {
            if (io.util.request(xdomain)) {
                return true;
            }
        } catch (e) {}
        return false;
    };
    /**
     * Check if the XHR transport supports corss domain requests.
     *
     * @returns {Boolean}
     * @api public
     */
    XHR.xdomainCheck = function () {
        return XHR.check(null, true);
    };
})('undefined' != typeof io ? io.Transport : module.exports, 'undefined' != typeof io ? io : module.parent.exports, this);
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */
(function (exports, io) {
    /**
     * Expose constructor.
     */
    exports.htmlfile = HTMLFile;
    /**
     * The HTMLFile transport creates a `forever iframe` based transport
     * for Internet Explorer. Regular forever iframe implementations will
     * continuously trigger the browsers buzy indicators. If the forever iframe
     * is created inside a `htmlfile` these indicators will not be trigged.
     *
     * @constructor
     * @extends {io.Transport.XHR}
     * @api public
     */

    function HTMLFile(socket) {
        io.Transport.XHR.apply(this, arguments);
    };
    /**
     * Inherits from XHR transport.
     */
    io.util.inherit(HTMLFile, io.Transport.XHR);
    /**
     * Transport name
     *
     * @api public
     */
    HTMLFile.prototype.name = 'htmlfile';
    /**
     * Creates a new ActiveX `htmlfile` with a forever loading iframe
     * that can be used to listen to messages. Inside the generated
     * `htmlfile` a reference will be made to the HTMLFile transport.
     *
     * @api private
     */
    HTMLFile.prototype.get = function () {
        this.doc = new ActiveXObject('htmlfile');
        this.doc.open();
        this.doc.write('<html></html>');
        this.doc.close();
        this.doc.parentWindow.s = this;
        var iframeC = this.doc.createElement('div');
        iframeC.className = 'socketio';
        this.doc.body.appendChild(iframeC);
        this.iframe = this.doc.createElement('iframe');
        iframeC.appendChild(this.iframe);
        var self = this,
            query = io.util.query(this.socket.options.query, 't=' + +new Date);
        this.iframe.src = this.prepareUrl() + query;
        io.util.on(window, 'unload', function () {
            self.destroy();
        });
    };
    /**
     * The Socket.IO server will write script tags inside the forever
     * iframe, this function will be used as callback for the incoming
     * information.
     *
     * @param {String} data The message
     * @param {document} doc Reference to the context
     * @api private
     */
    HTMLFile.prototype._ = function (data, doc) {
        this.onData(data);
        try {
            var script = doc.getElementsByTagName('script')[0];
            script.parentNode.removeChild(script);
        } catch (e) {}
    };
    /**
     * Destroy the established connection, iframe and `htmlfile`.
     * And calls the `CollectGarbage` function of Internet Explorer
     * to release the memory.
     *
     * @api private
     */
    HTMLFile.prototype.destroy = function () {
        if (this.iframe) {
            try {
                this.iframe.src = 'about:blank';
            } catch (e) {}
            this.doc = null;
            this.iframe.parentNode.removeChild(this.iframe);
            this.iframe = null;
            CollectGarbage();
        }
    };
    /**
     * Disconnects the established connection.
     *
     * @returns {Transport} Chaining.
     * @api public
     */
    HTMLFile.prototype.close = function () {
        this.destroy();
        return io.Transport.XHR.prototype.close.call(this);
    };
    /**
     * Checks if the browser supports this transport. The browser
     * must have an `ActiveXObject` implementation.
     *
     * @return {Boolean}
     * @api public
     */
    HTMLFile.check = function () {
        if (typeof window != "undefined" && 'ActiveXObject' in window) {
            try {
                var a = new ActiveXObject('htmlfile');
                return a && io.Transport.XHR.check();
            } catch (e) {}
        }
        return false;
    };
    /**
     * Check if cross domain requests are supported.
     *
     * @returns {Boolean}
     * @api public
     */
    HTMLFile.xdomainCheck = function () {
        // we can probably do handling for sub-domains, we should
        // test that it's cross domain but a subdomain here
        return false;
    };
    /**
     * Add the transport to your public io.transports array.
     *
     * @api private
     */
    io.transports.push('htmlfile');
})('undefined' != typeof io ? io.Transport : module.exports, 'undefined' != typeof io ? io : module.parent.exports);
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */
(function (exports, io, global) {
    /**
     * Expose constructor.
     */
    exports['xhr-polling'] = XHRPolling;
    /**
     * The XHR-polling transport uses long polling XHR requests to create a
     * "persistent" connection with the server.
     *
     * @constructor
     * @api public
     */

    function XHRPolling() {
        io.Transport.XHR.apply(this, arguments);
    };
    /**
     * Inherits from XHR transport.
     */
    io.util.inherit(XHRPolling, io.Transport.XHR);
    /**
     * Merge the properties from XHR transport
     */
    io.util.merge(XHRPolling, io.Transport.XHR);
    /**
     * Transport name
     *
     * @api public
     */
    XHRPolling.prototype.name = 'xhr-polling';
    /**
     * Establish a connection, for iPhone and Android this will be done once the page
     * is loaded.
     *
     * @returns {Transport} Chaining.
     * @api public
     */
    XHRPolling.prototype.open = function () {
        var self = this;
        io.Transport.XHR.prototype.open.call(self);
        return false;
    };
    /**
     * Starts a XHR request to wait for incoming messages.
     *
     * @api private
     */

    function empty() {};
    XHRPolling.prototype.get = function () {
        if (!this.open) return;
        var self = this;

        function stateChange() {
            if (this.readyState == 4) {
                this.onreadystatechange = empty;
                if (this.status == 200) {
                    self.onData(this.responseText);
                    self.get();
                } else {
                    self.onClose();
                }
            }
        };

        function onload() {
            this.onload = empty;
            this.onerror = empty;
            self.onData(this.responseText);
            self.get();
        };

        function onerror() {
            self.onClose();
        };
        this.xhr = this.request();
        if (global.XDomainRequest && this.xhr instanceof XDomainRequest) {
            this.xhr.onload = onload;
            this.xhr.onerror = onerror;
        } else {
            this.xhr.onreadystatechange = stateChange;
        }
        this.xhr.send(null);
    };
    /**
     * Handle the unclean close behavior.
     *
     * @api private
     */
    XHRPolling.prototype.onClose = function () {
        io.Transport.XHR.prototype.onClose.call(this);
        if (this.xhr) {
            this.xhr.onreadystatechange = this.xhr.onload = this.xhr.onerror = empty;
            try {
                this.xhr.abort();
            } catch (e) {}
            this.xhr = null;
        }
    };
    /**
     * Webkit based browsers show a infinit spinner when you start a XHR request
     * before the browsers onload event is called so we need to defer opening of
     * the transport until the onload event is called. Wrapping the cb in our
     * defer method solve this.
     *
     * @param {Socket} socket The socket instance that needs a transport
     * @param {Function} fn The callback
     * @api private
     */
    XHRPolling.prototype.ready = function (socket, fn) {
        var self = this;
        io.util.defer(function () {
            fn.call(self);
        });
    };
    /**
     * Add the transport to your public io.transports array.
     *
     * @api private
     */
    io.transports.push('xhr-polling');
})('undefined' != typeof io ? io.Transport : module.exports, 'undefined' != typeof io ? io : module.parent.exports, this);
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */
(function (exports, io, global) {
    /**
     * There is a way to hide the loading indicator in Firefox. If you create and
     * remove a iframe it will stop showing the current loading indicator.
     * Unfortunately we can't feature detect that and UA sniffing is evil.
     *
     * @api private
     */
    var indicator = global.document && "MozAppearance" in global.document.documentElement.style;
    /**
     * Expose constructor.
     */
    exports['jsonp-polling'] = JSONPPolling;
    /**
     * The JSONP transport creates an persistent connection by dynamically
     * inserting a script tag in the page. This script tag will receive the
     * information of the Socket.IO server. When new information is received
     * it creates a new script tag for the new data stream.
     *
     * @constructor
     * @extends {io.Transport.xhr-polling}
     * @api public
     */

    function JSONPPolling(socket) {
        io.Transport['xhr-polling'].apply(this, arguments);
        this.index = io.j.length;
        var self = this;
        io.j.push(function (msg) {
            self._(msg);
        });
    };
    /**
     * Inherits from XHR polling transport.
     */
    io.util.inherit(JSONPPolling, io.Transport['xhr-polling']);
    /**
     * Transport name
     *
     * @api public
     */
    JSONPPolling.prototype.name = 'jsonp-polling';
    /**
     * Posts a encoded message to the Socket.IO server using an iframe.
     * The iframe is used because script tags can create POST based requests.
     * The iframe is positioned outside of the view so the user does not
     * notice it's existence.
     *
     * @param {String} data A encoded message.
     * @api private
     */
    JSONPPolling.prototype.post = function (data) {
        var self = this,
            query = io.util.query(
                this.socket.options.query, 't=' + (+new Date) + '&i=' + this.index);
        if (!this.form) {
            var form = document.createElement('form'),
                area = document.createElement('textarea'),
                id = this.iframeId = 'socketio_iframe_' + this.index,
                iframe;
            form.className = 'socketio';
            form.style.position = 'absolute';
            form.style.top = '-1000px';
            form.style.left = '-1000px';
            form.target = id;
            form.method = 'POST';
            form.setAttribute('accept-charset', 'utf-8');
            area.name = 'd';
            form.appendChild(area);
            document.body.appendChild(form);
            this.form = form;
            this.area = area;
        }
        this.form.action = this.prepareUrl() + query;

        function complete() {
            initIframe();
            self.socket.setBuffer(false);
        };

        function initIframe() {
            if (self.iframe) {
                self.form.removeChild(self.iframe);
            }
            try {
                // ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
                iframe = document.createElement('<iframe name="' + self.iframeId + '">');
            } catch (e) {
                iframe = document.createElement('iframe');
                iframe.name = self.iframeId;
            }
            iframe.id = self.iframeId;
            self.form.appendChild(iframe);
            self.iframe = iframe;
        };
        initIframe();
        // we temporarily stringify until we figure out how to prevent
        // browsers from turning `\n` into `\r\n` in form inputs
        this.area.value = io.JSON.stringify(data);
        try {
            this.form.submit();
        } catch (e) {}
        if (this.iframe.attachEvent) {
            iframe.onreadystatechange = function () {
                if (self.iframe.readyState == 'complete') {
                    complete();
                }
            };
        } else {
            this.iframe.onload = complete;
        }
        this.socket.setBuffer(true);
    };
    /**
     * Creates a new JSONP poll that can be used to listen
     * for messages from the Socket.IO server.
     *
     * @api private
     */
    JSONPPolling.prototype.get = function () {
        var self = this,
            script = document.createElement('script'),
            query = io.util.query(
                this.socket.options.query, 't=' + (+new Date) + '&i=' + this.index);
        if (this.script) {
            this.script.parentNode.removeChild(this.script);
            this.script = null;
        }
        script.async = true;
        script.src = this.prepareUrl() + query;
        script.onerror = function () {
            self.onClose();
        };
        var insertAt = document.getElementsByTagName('script')[0]
        insertAt.parentNode.insertBefore(script, insertAt);
        this.script = script;
        if (indicator) {
            setTimeout(function () {
                var iframe = document.createElement('iframe');
                document.body.appendChild(iframe);
                document.body.removeChild(iframe);
            }, 100);
        }
    };
    /**
     * Callback function for the incoming message stream from the Socket.IO server.
     *
     * @param {String} data The message
     * @api private
     */
    JSONPPolling.prototype._ = function (msg) {
        this.onData(msg);
        if (this.open) {
            this.get();
        }
        return this;
    };
    /**
     * The indicator hack only works after onload
     *
     * @param {Socket} socket The socket instance that needs a transport
     * @param {Function} fn The callback
     * @api private
     */
    JSONPPolling.prototype.ready = function (socket, fn) {
        var self = this;
        if (!indicator) return fn.call(this);
        io.util.load(function () {
            fn.call(self);
        });
    };
    /**
     * Checks if browser supports this transport.
     *
     * @return {Boolean}
     * @api public
     */
    JSONPPolling.check = function () {
        return 'document' in global;
    };
    /**
     * Check if cross domain requests are supported
     *
     * @returns {Boolean}
     * @api public
     */
    JSONPPolling.xdomainCheck = function () {
        return true;
    };
    /**
     * Add the transport to your public io.transports array.
     *
     * @api private
     */
    io.transports.push('jsonp-polling');
})('undefined' != typeof io ? io.Transport : module.exports, 'undefined' != typeof io ? io : module.parent.exports, this);